KeyBoardDetector/LinuxVersionNotTested at main · barry006/KeyBoardDetector · GitHub

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using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using UnityEngine;

public class KeyboardLayoutDetector : MonoBehaviour
{
    private const int KL_NAMELENGTH = 9;

    [DllImport("X11")]
    private static extern IntPtr XOpenDisplay(IntPtr display);

    [DllImport("X11")]
    private static extern IntPtr XkbAllocKeyboard();

    [DllImport("X11")]
    private static extern int XkbGetNames(IntPtr display, uint which, IntPtr xkb);

    [DllImport("X11")]
    private static extern void XkbFreeKeyboard(IntPtr xkb, uint which, bool freeAll);

    private Dictionary<string, string> keyboardLayouts = new Dictionary<string, string>
    {
        { "us", "QWERTY" },        // English - United States
        { "gb", "QWERTY" },        // English - United Kingdom
        { "fr", "AZERTY" },        // French - France
        { "be", "AZERTY" },        // Belgian (Period) - Belgium
        { "de", "QWERTZ" },        // German - Germany
        { "el", "Greek" },         // Greek
        { "hu", "Hungarian" },     // Hungarian
        { "es", "Spanish" },       // Spanish - Spain
        { "he", "Hebrew" },        // Hebrew
        { "ru", "JCUKEN" },        // Russian - Russia
        { "jp", "Hiragana/Katakana" },  // Japanese - Japan
        { "kr", "Hangul" },        // Korean - Korea
        { "tw", "Bopomofo" },      // Chinese (Traditional) - Taiwan
    };

    void Start()
    {
        DetectKeyboardLayout();
    }

    void DetectKeyboardLayout()
    {
        IntPtr display = XOpenDisplay(IntPtr.Zero);
        if (display == IntPtr.Zero)
        {
            Debug.LogError("Failed to open X display");
            return;
        }

        IntPtr xkb = XkbAllocKeyboard();
        if (xkb == IntPtr.Zero)
        {
            Debug.LogError("Failed to allocate XKB keyboard");
            return;
        }

        int result = XkbGetNames(display, 0x0100, xkb); // 0x0100 for XkbKeyNamesMask
        if (result != 1)
        {
            Debug.LogError("Failed to get XKB names");
            XkbFreeKeyboard(xkb, 0x0100, true);
            return;
        }

        IntPtr namesPtr = Marshal.ReadIntPtr(xkb, 12); // Assuming layout name at offset 12
        string layoutId = Marshal.PtrToStringAnsi(namesPtr).ToLower();

        XkbFreeKeyboard(xkb, 0x0100, true);

        Debug.Log("Layout ID: " + layoutId);

        if (keyboardLayouts.TryGetValue(layoutId, out string layoutName))
        {
            Debug.Log("Keyboard detected: " + layoutName);
        }
        else
        {
            Debug.Log("Keyboard layout not recognized");
        }
    }

    void OnGUI()
    {
        IntPtr display = XOpenDisplay(IntPtr.Zero);
        if (display == IntPtr.Zero)
        {
            Debug.LogError("Failed to open X display");
            return;
        }

        IntPtr xkb = XkbAllocKeyboard();
        if (xkb == IntPtr.Zero)
        {
            Debug.LogError("Failed to allocate XKB keyboard");
            return;
        }

        int result = XkbGetNames(display, 0x0100, xkb); // 0x0100 for XkbKeyNamesMask
        if (result != 1)
        {
            Debug.LogError("Failed to get XKB names");
            XkbFreeKeyboard(xkb, 0x0100, true);
            return;
        }

        IntPtr namesPtr = Marshal.ReadIntPtr(xkb, 12); // Assuming layout name at offset 12
        string layoutId = Marshal.PtrToStringAnsi(namesPtr).ToLower();

        XkbFreeKeyboard(xkb, 0x0100, true);

        string layout = keyboardLayouts.ContainsKey(layoutId) ? keyboardLayouts[layoutId] : "Unknown";
        GUI.Label(new Rect(10, 10, 200, 20), "Keyboard: " + layout);
        GUI.Label(new Rect(10, 30, 200, 20), "Keyboard ID: " + layoutId);
    }
}